import java.util.*;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86183
 * Date: 2024-05-17
 * Time: 20:35
 */
public class Test {
    public static void main(String[] args) {
//        Stack<Integer> stack = new Stack<>();
//        Stack<Integer> stack1 = new LinkedList<>();
//        Stack<Integer> stack2 = new ArrayList<>();
//        Stack<Integer> stack3 = new ArrayDeque<>();
        Deque<Integer> deque = new ArrayDeque<>();
        Deque<Integer> deque1 = new LinkedList<>();
//        Deque<Integer > deque2 = new Vector<>()
        //栈

        Stack<Integer> stack = new Stack<>();
        Stack<Integer> stack2 = new
    }
}
